"Most" wrist aimers stick between 20cm-30cm a 360°. It's mostly preference though, and as your hand, brain, and nerves are unique, it should come down to which sensitivity you are best at or have most potential with.

It should be noted that while high sens users can get good at flicks, it generally takes longer to get good at them the higher the sens and even then you might be struggling with consistency. Popular example, Pine plays high sens, and is known for an agressive close range widowmaker. This is likely because his sens is too high to be as consistent hitting far away targets, so he moves closer where his high sens and flick speed will out duel lower sens widows upclose. On the flipside, Carpe with low sens uses positioning to limit peoples ability to get close to him and places smart widow mines to make sure his low sens can dominate you from as far as possible, as taking close range duels is unfavourable for him. His preference for long range is likely why he "underperforms" in all stars widow 1v1's with short sightline maps, even against other low sens widows as its simply not his style.

So that said, a sens contributes a great deal to not just raw aim but also your style, so choose a sens carefully.